/*通用样式*/
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.container{
    width: 1130px;
    margin: auto;
}
/*nav部分*/
nav{
    background: #000;
}
nav ul::after{
    content: "";
    display: table;
    clear: both;
}
.container::after{
    content: "";
    display: table;
    clear: both;
}
nav li{
    float: left;
    list-style: none;
}
nav a{
    color: #fff;
    text-decoration: none;
    display: block;
    padding: 24px 20px;
    font-size: 14px;
}
nav a:hover{
    background: #fff;
    color: #000;
}
nav .active a{
    background: #fff;
    color: #000;
}
/*banner部分*/
.banner{
    background: #2ba3d4;
    text-align: center;
    padding-top: 130px;
    padding-bottom: 130px;
    color: #ffffff;
}
.banner img{
    margin-bottom: 30px;
}
.banner p{
    margin-bottom: 30px;
}
.banner a{
    color: #2ba3d4;
    padding: 18px 28px;
    background: #ffffff;
    display: inline-block;
    text-decoration: none;
    border-radius: 3px;
    border: 1px solid #fff;
    transition:all .9s;
}
.banner a:hover{
    background: #2ba3d4;
    color: #ffffff;
}
/*become feat 部分*/
.become,.feat {
    padding-top: 150px;
    padding-bottom: 150px;
    text-align: center;
}
.feat{
    background: #3dc0f1;
}
.feat h2{
    text-align: center;
}

.become  h2{
    font-size: 42px;
    margin-bottom: 50px;
    font-weight: 300;
}
.row{
    margin-left: -15px;
    margin-right: -15px;
}
.col-md-4{
    width: 33.333333%;
    float: left;
    padding: 15px;
}
.col-md-3{
    width: 25%;
    float: left;
    padding: 15px;
}
.item{
    border: 1px solid #e5e5e5;
    border-bottom-color: #0ba1d8;
    padding: 30px;
    padding-bottom: 60px;
}
/*footer部分*/

footer{
background: #252525;
    padding-top: 50px;
    padding-bottom: 50px;
    color:#ddd ;
    text-align: center;
}